package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.DishVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;
    //分页查询
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }
    //新增套餐
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        //将SetmealDTO对象转换为Setmeal对象
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //向套餐中插入一条数据
        setmealMapper.insert(setmeal);
        //获取insert语句生成的主键值
        Long SetmealId = setmeal.getId();

        //获取SetmealDTO对象中的SetmealDish列表
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        //如果SetmealDish列表不为空且长度大于0
        if(setmealDishes != null && setmealDishes.size() > 0){
            //遍历SetmealDish列表
            setmealDishes.forEach(setmealDish -> {
                //将SetmealDish对象的SetmealId属性设置为SetmealId
                setmealDish.setSetmealId(SetmealId);
            });
            //菜品表插入n条数据
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    //批量删除套餐
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断是否能够删除----是否在起售中
        for(Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //批量删除套餐表中的数据
        setmealMapper.deleteBatch(ids);
        //批量删除套餐菜品关联表中数据
        setmealDishMapper.deleteBatch(ids);
    }

    //套餐起售，停售
    @Override
    public void updateStatus(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status == StatusConstant.ENABLE){
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            for(Dish dish : dishList){
                if(dish.getStatus() == StatusConstant.DISABLE){
                    throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

//修改套餐
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //先修改setmeal表中的数据
        setmealMapper.update(setmeal);

        List<Long> setmealId = new ArrayList<>();
        setmealId.add(setmeal.getId());

        //删除setmeal_dish关联的菜品
        setmealDishMapper.deleteBatch(setmealId);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmeal.getId());
        });
        //重新在setmeal_dish插入套餐中关联的菜品
        setmealDishMapper.insertBatch(setmealDishes);
    }

    //根据id查询套餐
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
